9-2r=13

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Solution for 9-2r=13 equation: 



9-2r=13

We move all terms to the left:

9-2r-(13)=0

We add all the numbers together, and all the variables

-2r-4=0

We move all terms containing r to the left, all other terms to the right

-2r=4

r=4/-2

r=-2

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